I believe that the first lesson plan for any subject should be to follow its historical progression. That's not the be-all and end-all but, whether you're talki

I believe that the first lesson plan for any subject should be to follow its historical progression. That's not the be-all and end-all but, whether you're talking about computer science or physics or economics, it's a good starting point because it's one proven way to deal with the field's complexity. You just have to be clear that the simpler models from older times are pedagogical tools, not current understanding.